The Duke Engine

A more efficient internal combustion engine

This is fascinating to watch in action.

http://pixelbark.com/13045/how-the-duke-engines-increases-the-efficiency-of-the-internal-combustion-engine

Very cool. It seems like the engineers have taken the best benefits of 3 different technologies and combined them: the radial aircraft piston engine, the Wankel, and the swash plate.